Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

A305588

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =23a(2) =95a(3) =390a(4) =1626a(5) =6818a(6) =28530a(7) =119266a(8) =498890a(9) =2087148a(10) =8731184a(11) =36525814a(12) =152804412a(13) =639253506a(14) =2674304822a(15) =11187927898a(16) =46804640008a(17) =195807072344a(18) =819158586242

External references